Difference between revisions of "Neutral Cosmic Strings"

From FRB Theory Wiki
Jump to: navigation, search
Line 4: Line 4:
 
<!-- This is an example. Change the right hand side of all these assignments -->
 
<!-- This is an example. Change the right hand side of all these assignments -->
 
{{FRBTableTemplate
 
{{FRBTableTemplate
|Category              = Other
+
|Category              = Void
 
|Progenitor            = Neutral Cosmic Strings
 
|Progenitor            = Neutral Cosmic Strings
 
|Type                  = Single
 
|Type                  = Single
|EnergyMechanism        = Cusp decay
+
|EnergyMechanism        = N/A
|EmissionMechanism      = --
+
|EmissionMechanism      = N/A
|LFRadioCounterpart    = Yes
+
|LFRadioCounterpart    = N/A
|HFRadioCounterpart    = --
+
|HFRadioCounterpart    = N/A
|MicrowaveCounterpart  = --
+
|MicrowaveCounterpart  = N/A
|THzCounterpart        = --
+
|THzCounterpart        = N/A
|OIRCounterpart        = --
+
|OIRCounterpart        = N/A
|XrayCounterpart        = --
+
|XrayCounterpart        = N/A
|GammarayCounterpart    = GRB <br/> if jet aligned
+
|GammarayCounterpart    = N/A
|GWCounterpart          = Yes
+
|GWCounterpart          = N/A
|NeutrinoCounterpart    = Yes
+
|NeutrinoCounterpart    = N/A
 
|References            = http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1707.02397
 
|References            = http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1707.02397
|Comments              = High energy cosmic rays are also expected.
+
|Comments              = N/A
 
}}
 
}}
  
 
== Model Description ==
 
== Model Description ==
  
Nambu-Goto (infinitely thin, idealised) cosmic strings generically form cusps, portions of the string which fold back onto themselves and move at the speed of light. The cusps decay, emitting a beam of coherent radiation. The decay particle can ostensibly be of any energy and frequency range, and so should extend down into radio bursts.  
+
Nambu-Goto (infinitely thin, idealised) cosmic strings generically form cusps---portions of the string which fold back onto themselves and move at the speed of light. The cusps decay to form a beam of coherent radiation, where the emission can ostensibly be of any energy and frequency range. As such, cusp decay has been considered as an FRB origin. The event rate, timescale, and flux are shown to be consistent with FRB data, however the relativistic effects on the cusp shape where not originally considered. By taking this into account, the consistency of the theory breaks down.
  
 
== Observational Constraints ==
 
== Observational Constraints ==
  
The event rate, timescale, and flux emitted are shown to be consistent with FRB data, however the relativistic effects on the cusp shape was not factored in. By taking this into account, cusp decay is in fact incompatible with current FRB data. Cosmic strings are not ruled out by observations, and would necessarily include counterparts of other electromagnetic frequencies, specifically, GRBs, cosmic rays and neutrinos, and GWs.
+
N/A

Revision as of 14:00, 10 October 2018





Summary Table
Category Progenitor Type Energy Mechanism Emission Mechanism Counterparts References Brief Comments
LF Radio HF Radio Microwave Terahertz Optical/IR X-rays Gamma-rays Gravitational Waves Neutrinos
Void Neutral Cosmic Strings Single N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1707.02397 N/A

Definitions: LF Radio (3 MHz to 3 GHz); HF Radio (3 GHz to 30 GHz); Microwave (30 to 300 GHz)


Model Description

Nambu-Goto (infinitely thin, idealised) cosmic strings generically form cusps---portions of the string which fold back onto themselves and move at the speed of light. The cusps decay to form a beam of coherent radiation, where the emission can ostensibly be of any energy and frequency range. As such, cusp decay has been considered as an FRB origin. The event rate, timescale, and flux are shown to be consistent with FRB data, however the relativistic effects on the cusp shape where not originally considered. By taking this into account, the consistency of the theory breaks down.

Observational Constraints

N/A